William Hiester Jr. (October 10, 1790 – October 13, 1853) was an American politician from Pennsylvania who served as an Anti-Masonic member of the United States House of Representatives for Pennsylvania's 4th congressional district from 1831 to 1837. A member of the Hiester Family political dynasty, he was the father of U.S. Congressman Isaac Ellmaker Hiester and the uncle of Pennsylvania State Senator and U.S. Congressman Hiester Clymer.